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3 years ago

Janine inflated a ball to a radius of 18 cm and another ball to a radius of 12 cm.

Mathematics

2 answers:

nekit [7.7K]3 years ago

6 0

Answer:since your are looking for the volume of the ball, the answer would be 17182.08

Step-by-step explanation:

Sladkaya [172]3 years ago

3 0

Volume of a ball = (4/3)πr³

When r = 18cm, V = (4/3)×3.14×18³ =24416.64 cm³
When r = 12cm, V = (4/3)×3.14×12³ =7234.56 cm³
Difference = 24416.64 - 7234.56 = 17182.08 cm³

the volume of air in the larger ball is 17182.08 cm³ greater than smaller ball

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Ksenya-84 [330]

Answer:

650

Step-by-step explanation:

so the way I did this was by adding how much he works per week which is 35 per week. so he works 70 hours in 2 weeks. he earns 10 dollars per hour. so 10 times 70 you get 700 but he spends 50. so 700 minus 50. you get 650. he has 650 dollars left.

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3 years ago

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Answer:

A.

The student made an error in step 3 because a is positive in Quadrant IV; therefore,

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Step-by-step explanation:

Given

$P\ (a,b)$

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Required

Where and which error did the student make

Given that the angle is in the 4th quadrant;

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Hence;

$r = \sqrt{(a)^2 + (b)^2}$

Since a belongs to the x axis and b belongs to the y axis;

$cos\theta$ is calculated as thus

$cos\theta = \frac{a}{r}$

Substitute $r = \sqrt{(a)^2 + (b)^2}$

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$cos\theta = \frac{a}{\sqrt{a^2 + b^2}}$

Rationalize the denominator

$cos\theta = \frac{a}{\sqrt{a^2 + b^2}} * \frac{\sqrt{a^2 + b^2}}{\sqrt{a^2 + b^2}}$

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3 years ago

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Step-by-step explanation:

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nata0808 [166]

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